The 300-acre McMillan Mesa Natural Area is one of the last intact native grasslands within the city of Flagstaff and provides habitat for deer, prairie dogs, American kestrels, and other fauna. To preserve the native grassland, the city of Flagstaff’s Open Space Program will work with partners to remove invasive trees, starting on April 7, 2021. Six large Russian Olive trees and over 100 Siberian Elm trees were identified for removal, mainly along the Flagstaff Urban Trail System (FUTS) and Arizona Trail within the McMillan Mesa Natural Area.